CN111457666B - Anti-condensation control method for refrigeration equipment - Google Patents
Anti-condensation control method for refrigeration equipment Download PDFInfo
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- CN111457666B CN111457666B CN201910047136.0A CN201910047136A CN111457666B CN 111457666 B CN111457666 B CN 111457666B CN 201910047136 A CN201910047136 A CN 201910047136A CN 111457666 B CN111457666 B CN 111457666B
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- 238000009833 condensation Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000005057 refrigeration Methods 0.000 title claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 69
- 230000005494 condensation Effects 0.000 claims abstract description 22
- 238000004904 shortening Methods 0.000 claims abstract description 4
- 230000007613 environmental effect Effects 0.000 claims description 7
- 230000002035 prolonged effect Effects 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003405 preventing effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/02—Detecting the presence of frost or condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/04—Preventing the formation of frost or condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/14—Collecting or removing condensed and defrost water; Drip trays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
- F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
- F25D2321/141—Removal by evaporation
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention relates to the technical field of refrigeration equipment, in particular to an anti-condensation control method of the refrigeration equipment. The control method comprises the following steps: entering a dew removing mode, calculating and confirming that the dew point temperature is T d Presetting the working time of the heating wire as K; after the compressor is stopped every time, the opening time K of the heating wire is controlled x Then closing the valve; recording the shutdown times of the compressor, and recording the continuous shutdown of the compressor for A times every time as a stage; obtaining the temperature T of the dew removing pipe after the compressor is stopped for A times in the x stage x X is more than or equal to 1; calculating the difference delta T between the dew point temperature and the dew point temperature of the dew removing pipe x ＝T x ‑T d (ii) a If Δ T x A, prolonging the working time of the heating wire in the (x + 1) th stage; if a is less than or equal to delta T x B is less than or equal to b, and the working time of the heating wire in the (x + 1) th stage is unchanged; if Δ T x B, shortening the working time of the heating wire in the x +1 th stage. According to the control method provided by the invention, the opening time of the heating wire at each stage is adjusted by measuring the temperature of the surface area of the dew removing pipe in real time, the work of the heating wire is accurately controlled, and the energy consumption is saved while the condensation is prevented.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to an anti-condensation control method of the refrigeration equipment.
Background
As a type of refrigerating equipment, refrigerators, whose interior is always kept at a very low temperature, particularly in the freezer compartment, are much cooler, typically below-18 ℃. Although the door seal of the refrigerator has enough heat preservation and insulation capacity, the temperature difference between the inside and the outside of the refrigerator is obviously increased when the ambient temperature is higher in summer, once the humidity around the refrigerator is increased, the door seal can reach a condensation point (namely the temperature of condensation generated initially in the water vapor cooling process), the condensation condition is generated, and particularly, the door seal of a freezing chamber is obvious. This is because the lower portion of the freezer compartment has the lowest temperature and therefore the lower portion of the freezer door seal is most likely to have condensation.
In the prior art, under a low-ring-temperature high-humidity environment, a refrigerator dew removing pipe increases the load of a refrigerator by opening a defrosting heating wire near an evaporator, so that the temperature of the dew removing pipe is increased, and a dew condensation preventing effect is achieved.
However, the above method cannot accurately determine the open rate of the heating wire, and may have a problem of insufficient heating power, which still causes condensation; or the problem of overhigh heating power causes the dew removing pipe to scald hands and the energy consumption is wasted.
Disclosure of Invention
In order to solve the technical problem, the invention provides an anti-condensation control method for refrigeration equipment.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: the refrigerating equipment comprises a box body, an evaporator, a compressor, a condenser and a capillary tube, wherein the evaporator, the compressor, the condenser and the capillary tube are arranged in the box body and are mutually communicated to form a loop; the control method comprises the following steps:
entering a dew point removing mode, calculating and confirming that the dew point temperature is T d Presetting the working time of the heating wire as K;
after the compressor is stopped every time, the opening time K of the heating wire is controlled x Then closing the valve;
recording the shutdown times of the compressor, and recording the continuous shutdown of the compressor for A times every time as a stage;
obtaining the temperature T of the dew removing pipe after the compressor is stopped for A times in the x stage x Wherein x is more than or equal to 1;
calculating the difference delta T between the dew point temperature and the dew point temperature of the dew removing pipe x ＝T x -T d ；
If Δ T x A, the working time of the heating wire in the x +1 th stage is prolonged, namely K x+1 ＞K；
If a is less than or equal to delta T x B is less than or equal to, the working time of the heating wire in the x +1 stage is not changed, namely K x+1 ＝K；
If Δ T x B, shortening the working time of the heating wire in the x +1 th stage, namely K x+1 ＜K。
As a further improvement of the present invention, the control method further includes:
if the difference between the dew point temperature and the dew point temperature of the dew point removing pipe is always less than a between the x stage and the x + n stage, the working time of any y +1 stage heating wire is longer than that of the y stage heating wire, namely K y+1 ＞K y Wherein n is more than or equal to 1,x and less than or equal to y and y +1 and less than or equal to x + n.
As a further improvement of the present invention, the control method further includes:
if the difference between the dew point removing pipe temperature and the dew point temperature is always less than a between the x stage and the x + n stage, the difference between the working time length of any y +1 stage heating wire and the working time length of the y stage heating wire is a fixed value m, namely K y+1 ＝K y + m; and, K x+n ＝K x +n*m。
As a further improvement of the present invention, the control method further comprises:
if the difference between the dew point temperature and the dew point temperature of the dew point removing pipe is always greater than b between the x stage and the x + p stage, the working time of any y +1 stage heating wire is less than that of the y stage heating wire, namely K y+1 ＜K y Wherein p is more than or equal to 1,x and less than or equal to y and more than or equal to y +1 and less than or equal to x + n.
As a further improvement of the present invention, the control method further includes:
if the difference between the dew point temperature and the dew point temperature of the dew point removing pipe is always greater than b between the x stage and the x + p stage, the difference between the working time length of any y +1 stage heating wire and the working time length of the y stage heating wire is a fixed value m, namely K y+1 ＝K y -m; and, K x+p ＝K x －p*m。
As a further development of the invention, the value of a is-0.5 and the value of b is 0.5.
As a further improvement of the invention, the refrigerating equipment also comprises a temperature sensor for sensing the temperature of the surface area of the dew removing pipe, T x Is the integrated average temperature value of the surface area of the dew removal tube.
As a further improvement of the invention, the refrigeration equipment also comprises an ambient temperature sensor and a humidity sensor, and the step of calculating and confirming the dew point temperature is T d The method specifically comprises the following steps: sensing and calculating the dew point temperature T by an ambient temperature sensor and a humidity sensor d 。
As a further improvement of the invention, before the step of "the refrigeration equipment enters the dew removal mode", the method comprises the following steps:
acquiring an environmental temperature value and a humidity value;
confirming that the ambient temperature value is less than 25 ℃ and the humidity value is greater than 90%.
The beneficial effects of the invention are: according to the anti-condensation control method for the refrigeration equipment, the time length for opening the heating wire at each stage is adjusted by measuring the temperature of the surface area of the condensation removing pipe in real time, the temperature of the condensation removing pipe is accurately controlled, the operation of the heating wire is accurately controlled under the condition that the use of a user is not influenced, and further the energy consumption is saved while condensation is prevented.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a flowchart of an anti-condensation control method of a refrigeration apparatus according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
As shown in fig. 1, the invention provides a condensation prevention control method for refrigeration equipment, which is used for the refrigeration equipment, wherein the refrigeration equipment comprises a box body, an evaporator, a compressor, a condenser and a capillary tube, wherein the evaporator, the compressor, the condenser and the capillary tube are arranged in the box body and are mutually communicated to form a loop; the control method comprises the following steps:
entering a dew point removing mode, calculating and confirming that the dew point temperature is T d Presetting the working time of the heating wire as K;
after the compressor is stopped every time, the opening time K of the heating wire is controlled x Then closing the valve; in the embodiment of the invention, the heating wire is controlled to be opened after the compressor is stopped every time and a period of time is set.
Recording the shutdown times of the compressor, and recording the continuous shutdown of the compressor for A times every time as a stage;
obtaining the temperature T of the dew removing pipe after the compressor is stopped for A times in the x stage x Wherein x is more than or equal to 1;
calculating the difference delta T between the dew point temperature and the dew point temperature of the dew removing pipe x ＝T x -T d ；
If Δ T x < a, the working time of the heating wire in the (x + 1) th stage, i.e. K, is prolonged x+1 ＞K；
If a is less than or equal to delta T x B is less than or equal to b, the working time of the heating wire in the x +1 stage is not changed, namely K x+1 ＝K；
If ΔT x B, shortening the working time of the heating wire in the x +1 th stage, namely K x+1 < K. The opening time of the heating wire at each stage is adjusted by measuring the temperature of the surface area of the dew removing pipe in real time, the temperature of the dew removing pipe is accurately controlled, and the phenomenon that the dew removing pipe is scalded due to the fact that the heating time is longer than the required time under the condition of higher temperature is avoided; the phenomenon that condensation still exists due to the fact that heating time is shorter than required time under the condition of low temperature is avoided, and the effects of preventing condensation and saving energy consumption are achieved.
It should be noted that if the difference between the dew point temperature and the dew point temperature of the dew point removing pipe is always less than a or always greater than b in the successive stages, the working time of the heating wire in each stage is increased or decreased regularly. The following is a detailed description.
For example, if the difference between the dew point temperature and the dew point temperature of the dew point removing pipe is always less than a between the x-th stage and the x + n-th stage, the working time of any y + 1-th stage heating wire is longer than that of the y-th stage heating wire, namely K y+1 ＞K y Wherein n is more than or equal to 1,x and less than or equal to y and more than or equal to y +1 and less than or equal to x + n;
in the specific implementation mode of the invention, the difference between the working time length of any y +1 stage heating wire and the working time length of the y stage heating wire is a fixed value m, namely K x+n ＝K x + n × m. For example, if Δ T is calculated after a number of consecutive shutdowns in phase 2 2 If < a, the working time of the heating wire in the 3 rd stage is prolonged to ensure that K 3 = K + m, Δ T is calculated after A stoppages 3 Or less than a, prolonging the working time of the heating wire in the 4 th stage to ensure that K 4 K +2m, and so on until a certain stage is stopped for A times and then delta T is calculated x If a is more than or equal to a, the range of the value is judged again, and if a is less than or equal to delta T x B is less than or equal to b, the working time of the heating wire is not changed, namely K x+1 K (= K); if Δ T x B, the working time of the heating wire is shortened, namely K x+1 ＜K。
For example, if the difference between the dew point removing pipe temperature and the dew point temperature is always greater than b between the x-th stage and the x + p-th stage, the working time of any y + 1-th stage heating wire is less than that of the y-th stage heating wire,namely K y+1 ＜K y Wherein p is more than or equal to 1,x and less than or equal to y and more than or equal to y +1 and less than or equal to x + n.
In the specific implementation mode of the invention, the difference between the working time of the heating wire in any y +1 th stage and the working time of the heating wire in the y-th stage is a fixed value m, namely K x+p ＝K x -p m. For example, if Δ T is calculated after a number of consecutive shutdowns in phase 6 6 B, prolonging the working time of the heating wire in the 7 th stage to ensure that K is 7 K-m, delta T is calculated after A stoppages 7 Or less than a, prolonging the working time of the heating wire in the 8 th stage to ensure that K is 8 K-2m, and so on until a certain stage is stopped for A times and then delta T is calculated x B is less than or equal to b, then judging the range of the value, if a is less than or equal to delta T x B is less than or equal to b, the working time of the heating wire is not changed, namely K x+1 = K; if Δ T x If < a, the operating time of the heating wire is prolonged, i.e. K x+1 ＞K。
Preferably, in a particular embodiment of the invention, said a has a value of-0.5, b has a value of 0.5; of course, the values of a and b may be adjusted to meet the actual anti-condensation requirements, depending on the particular configuration of the refrigeration equipment.
In addition, the refrigerating apparatus further includes a temperature sensor for sensing a temperature of a surface area of the dewing pipe, the T x Is the integrated average temperature value of the surface area of the dew removal tube. The temperature value T of the dew removing pipe is eliminated by calculating the integral average temperature on the area of the dew removing pipe x The randomness of the dew removing pipe enables the result to reflect the real temperature of the whole dew removing pipe, and further accurate control is achieved.
The refrigeration equipment also comprises an ambient temperature sensor and a humidity sensor, and the dew point temperature is calculated and confirmed to be T d The method specifically comprises the following steps: sensing and calculating the dew point temperature T by an ambient temperature sensor and a humidity sensor d In general, the dew point temperature is the temperature at which the air is cooled to saturation with the water vapor content of the air being constant and the air pressure being maintained constant, and the dew point temperature T is calculated from the ambient temperature value and the humidity value d 。
Correspondingly, before the step of entering the dew removal mode, the refrigeration equipment comprises the following steps:
acquiring an environmental temperature value and a humidity value;
confirming that the ambient temperature value is less than 25 ℃ and the humidity value is greater than 90%. Under the environmental conditions, the environmental temperature is not high, but the humidity is high, so condensation is easily formed on the surface of the refrigerator body, the environmental temperature and the humidity condition must be detected before entering the condensation removing mode, and the condensation removing mode is entered after the environmental conditions are met, so that the energy consumption of the refrigerator is saved.
Therefore, in summary, according to the anti-condensation control method for the refrigeration equipment, the opening time of the heating wire at each stage is adjusted by measuring the temperature of the surface area of the condensation removing pipe in real time, the temperature of the condensation removing pipe is accurately controlled, the operation of the heating wire is accurately controlled under the condition that the use of a user is not influenced, and the energy consumption is saved while the condensation is prevented.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (8)
1. The anti-condensation control method of the refrigeration equipment is used for the refrigeration equipment, the refrigeration equipment comprises a box body, an evaporator, a compressor, a condenser and a capillary tube, the evaporator, the compressor, the condenser and the capillary tube are arranged in the box body and are mutually communicated to form a loop, the anti-condensation control method is characterized in that the refrigeration equipment comprises an anti-condensation pipe communicated with the condenser, a heating wire, an environment temperature sensor and a humidity sensor, the heating wire, the environment temperature sensor and the humidity sensor are arranged close to the evaporator, and the anti-condensation pipe is arranged close to the outer surface of the box body to prevent condensation from being generated on the outer surface of the box body; the control method comprises the following steps:
entering a dew point removing mode, and detecting, calculating and confirming that the dew point temperature is T through an environment temperature sensor and a humidity sensor d ，
Presetting the working time of the heating wire as K;
after the compressor is stopped every time, the opening time K of the heating wire is controlled x Then closing the valve;
recording the shutdown times of the compressor, and recording the continuous shutdown of the compressor for A times every time as a stage;
after the compressor is continuously stopped for A times in the x stage, the temperature T of the dew removing pipe is obtained x Wherein x is more than or equal to 1;
calculating the difference delta T between the temperature of the dew removing pipe and the dew point temperature x ＝T x -T d ；
If Δ T x < a, the working time of the heating wire in the (x + 1) th stage, i.e. K, is prolonged x+1 ＞K；
If a is less than or equal to delta T x B is less than or equal to b, the working time of the heating wire in the x +1 stage is not changed, namely K x+1 ＝K；
If Δ T x B, shortening the working time of the heating wire in the x +1 th stage, namely K x+1 ＜K。
2. The anti-condensation control method of a refrigeration apparatus according to claim 1, characterized by further comprising:
if the difference between the dew point temperature and the dew point temperature of the dew point removing pipe is always less than a between the x stage and the x + n stage, the working time of any y +1 stage heating wire is longer than that of the y stage heating wire, namely K y+1 ＞K y Wherein n is more than or equal to 1,x and less than or equal to y and y +1 and less than or equal to x + n.
3. The anti-condensation control method of a refrigeration apparatus according to claim 2, characterized by further comprising:
if the difference between the dew point temperature and the dew point temperature of the dew point removing pipe is always less than a between the x stage and the x + n stage, the difference between the working time length of any y +1 stage heating wire and the working time length of the y stage heating wire is a fixed value m, namely K y+1 ＝K y + m; and, K x+n ＝K x +n*m。
4. The condensation prevention control method of a refrigeration apparatus according to claim 1, characterized by further comprising:
if the difference between the dew point removing pipe temperature and the dew point temperature is always greater than b between the x stage and the x + p stage, the working time of any y +1 stage heating wire is less than that of the y stage heating wire, namely K y+1 ＜K y Wherein p is more than or equal to 1,x, y is more than or equal to y and is more than or equal to y +1 and is more than or equal to x + n.
5. The anti-condensation control method of a refrigeration apparatus according to claim 4, characterized by further comprising:
if the difference between the dew point temperature and the dew point temperature of the dew point removing pipe is always greater than b between the x stage and the x + p stage, the difference between the working time length of any y +1 stage heating wire and the working time length of the y stage heating wire is a fixed value m, namely K y+1 ＝K y -m; and, K x+p ＝K x －p*m。
6. The method as claimed in claim 1, wherein a is-0.5 and b is 0.5.
7. The anti-condensation control method for a refrigeration apparatus according to claim 1, wherein the refrigeration apparatus further comprises a temperature sensor for sensing a temperature of a surface area of the dew-removing pipe, wherein T is a temperature of the surface area of the dew-removing pipe x Is the integrated average temperature value of the surface area of the dew removal tube.
8. The anti-condensation control method for the refrigeration equipment as claimed in claim 1, wherein before the step of entering the condensation removing mode, the refrigeration equipment comprises:
acquiring an environmental temperature value and a humidity value;
confirming that the ambient temperature value is less than 25 ℃ and the humidity value is greater than 90%.
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| CN114811825B (en) * | 2022-03-23 | 2024-08-16 | 青岛海尔空调器有限总公司 | Control method and device for condensation prevention of air conditioner, storage medium and air conditioner |
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